2001 TOYOTA PRIUS navigation

± DIAGNOSTICSNAVIGATION SYSTEM
DI±847
2001 PRIUS (RM778U)
5 Check the multi display.
CHECK:
Check terminal TAIL.
OK:
TAIL: See ºMulti Displayº of ºTERMINAL OF ECUº.
OK Replace the multi display.
NG
Replace or repair wire harness.

± DIAGNOSTICSNAVIGATION SYSTEM
DI±849
2001 PRIUS (RM778U)
17. Vehicle position is deviated from correct point badly.
INSPECTION PROCEDURE
1 Check the mark display. (At a place with a fine view, is GPS mark displayed or
not?)
No Go to step 7.
Ye s
2 Does the trouble occur in the specific area or not?
Yes Normal. (If the vehicle is positioned in the place
where it is difficult to be identified, the current
vehicle position may be incorrectly displayed.)
No
3 Check the setting (Color of the automatic calibration button on the calibration
screen).
Green Normal. (Drive the vehicle (10 km or more) until
calibration is completed.
Blue
4 Service check mode. (Is º58±43º displayed in the unit check mode of the navigation
ECU?)
Yes Troubleshoot for each diagnosis.
No
DI7PA±01

DI±850
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
5 Navigation check mode (vehicle signal check mode: SPD).
NG Replace or repair speed sensor wire harness.
OK
6 Recurrence Test (Confirm the phenomenon) (Correct the current position and
drive the vehicle for a while with the GPS mark displayed).
OK Normal.
NG
Replace the navigation ECU.
7 Check if the harness is caught or sharply bent or not.
NG Navigation antenna is surely connected.
OK
8 Check optional components. (Does it become if the optionals such as the theft
deterrent system is removed?)
Yes Remove or change the position of the compo-
nents.
HINT:
Some optionals receive radio signals, and if this happens, GPS
reception may be affected.
No

± DIAGNOSTICSNAVIGATION SYSTEM
DI±851
2001 PRIUS (RM778U)
9 Is there anything such as a film stuck to the window?
Yes Reception may be affected by a screen such as
a film.
No
10 Service check mode. (Is º80±40, 41º is displayed in the unit check mode of the
navigation ECU?)
Yes Troubleshoot for each diagnosis.
No
Replace the navigation antenna.
HINT:
If the trouble still occurs, replace the navigation ECU.

DI±852
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
18. GPS mark does not appear.
INSPECTION PROCEDURE
1 Check the mark display. (At a place with a fine view, is GPS mark displayed or
not?)
Yes Normal.
No
2 Check if the harness is caught or sharply bent or not.
NG Navigation antenna is surely connected.
OK
3 Check optional components. (Does it become normal if the optionals such as the
theft deterrent system is removed?)
Yes Remove or change the position of the compo-
nents.
HINT:
Some optionals receive radio signals, and if this happens, GPS
reception may be affected.
No
DI7PB±01

± DIAGNOSTICSNAVIGATION SYSTEM
DI±853
2001 PRIUS (RM778U)
4 Is there anything such as a film stuck to the window?
Yes Reception may be affected by a screen such as
a film.
No
5 Service check mode. (Is º80±40, 41º is displayed in the unit check mode of the
navigation ECU?)
Yes Troubleshoot for each diagnosis.
No
Replace the navigation antenna.
HINT:
If the trouble still occurs, replace the navigation ECU.

± DIAGNOSTICSNAVIGATION SYSTEM
DI±855
2001 PRIUS (RM778U)
20. Vehicle position rotates without control. (Map rotates without
control)
INSPECTION PROCEDURE
1 Recheck. (While not rotating the vehicle, turn the ignition switch ON from OFF
again.)
OK Normal. (While the vehicle was turning, the igni-
tion switch was turned ON.)
NG
2 System check mode. (Is º58±10º is displayed in the unit check mode of the navi-
gation ECU?)
Yes Replace the navigation ECU.
No
3 System check mode. (Is º58±43º is displayed in the unit check mode of the navi-
gation ECU?)
Yes Replace and repair SPD terminal wire harness.
No
4 Navigation check mode (vehicle signal check mode: SPD and gyro).
OK Replace the navigation ECU.
NG
DI7PD±01

DI±856
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
Replace or repair wire harness.